Troubleshooting

Solutions to common issues you may encounter.

Game Won't Start

• Missing BIOS files: Some platforms require BIOS files to run. Check Settings > BIOS Files and upload any required files for the platform. See the BIOS Files page for details.
• Invalid game file: The file may be corrupted or in an unsupported format. Try re-downloading or using a different format (e.g., .bin instead of .ecm).
• Try a different core: Go to Settings > Cores and switch to a different emulator core for the platform.

No Audio

• Tap the screen: Browsers require a user interaction before playing audio. Tap or click anywhere on the game screen.
• Check the mute button: Make sure the game isn't muted in the on-screen controls.
• iOS Ringer Switch: On iPhone/iPad, make sure the ringer switch on the side of your device is not set to silent.

Poor Performance

• Disable Low Power Mode: On iOS, Low Power Mode reduces performance and can cause games to run slowly. Turn it off in your device settings.
• Try a different core: Some cores prioritize accuracy over speed. Switch to a faster core in Settings > Cores.
• Disable Rewind: Rewind continuously records game state and can impact performance. Disable it if you're not using it.
• Close other tabs: Emulation is CPU-intensive. Close unnecessary browser tabs and apps.
• Try a different browser: Chrome and Edge generally perform best.
• Disable shaders: Some visual filters can impact performance.

Corrupted save states

Sometimes a save state can go bad and cause performance issues or other problems when loaded. If a game is running poorly after loading a save state:

• Try loading an older save state
• Or save in-game, change your save settings to Latest In-Game Save, and relaunch the game from that in-game save

Saves Not Working

• Check storage space: Go to Settings > Storage to see how much space is available. If storage is nearly full, offload games you're not playing.
• In-game vs save states: Some games have their own save system (in-game saves). These are separate from save states. Make sure you're using the right one.

Can I upload save states from other emulators?

No. Save states are not compatible across emulators or even different versions of the same emulator. You can only import in-game saves (SRAM). To transfer your progress, export your in-game save from your other emulator and import it from the In-Game Saves tab in the save menu in the game menu.

Controller Not Detected

• Reconnect the controller: Disconnect and reconnect your Bluetooth or USB controller.
• Press a button: Some browsers don't detect controllers until a button is pressed. Press any button on the controller, then refresh the page.
• Check browser support: Make sure your browser supports the Gamepad API. Most modern browsers do.

Black Screen

• Wait a moment: Some games take a few seconds to load, especially disc-based games.
• Check BIOS files: Disc-based platforms (PlayStation, Sega Saturn, Sega CD) usually require BIOS files.
• Try a different core: The current core may not support the game. Switch cores in Settings > Cores.

Nintendo DS: "A communication error has occurred"

This error typically appears when DS BIOS files are missing. Some DS games check for the system firmware on startup and show this error if it's not found.

To fix this, upload the Nintendo DS BIOS files in Settings > BIOS Files:

• bios7.bin (ARM7 BIOS)
• bios9.bin (ARM9 BIOS)
• firmware.bin (NDS Firmware)

After uploading, restart the game. See BIOS Files for more details.

Multiplayer Issues

• Connection failed: Make sure both players have a stable internet connection. Try refreshing the page and reconnecting.
• Session not found: The session may have expired. Create a new session and share the link again.
• Video/audio not working: Check that you've granted camera and microphone permissions in your browser. If the device is in use by another app, close that app first.

iOS-Specific Issues

• Low Power Mode: Causes significant slowdowns. Disable it in Settings > Battery.
• Safari sign-in issues: If sign-in fails on Safari, try again or use a different browser.
• Audio cuts out: Make sure the ringer switch is not on silent and that no other app is interrupting audio.

Payment Issues

• Checkout not loading: Try refreshing the page. If the issue persists, try a different browser or clear your cache.
• Purchase not recognized: It may take a moment for your subscription to activate. Sign out and back in if it doesn't appear.
• App Store purchases: Subscriptions purchased through the iOS app are managed through Apple. Go to your device's Settings > Apple ID > Subscriptions.

Is 3DS supported?

No. The 3DS is not a supported console.

How do I delete my account?

You can delete your account from Settings > Profile.

Still Need Help?

Visit the Support page to chat with us directly or report a bug.